ERGONOMIC DESIGN The vertical ergonomic mouse can reduce the damage to the palm joint and muscles on your wrist during a long period of using the mouse. WIDE COMPATIBILITY Digital vertical ergonomic optical mouse is compatible with Mac OS X, Linux and Windows of all versions. This mouse has a nano USB receiver, which can be inserted into the USB port of laptop or computer to connect. OPTICAL MOTION DETECTION This vertical ergonomic mouse is equipped with a high precision optical sensor, and the sensitivity is adjustable, providing smooth and lag-free use for smooth and precise gliding on any surface. RECHARGEABLE BATTERY This wireless laptop mouse uses environmentally friendly polymer battery to prevent overcharging, battery life, and can be used while charging. Can be used for 3 months on a single charge.